40043223243 has 6 divisors (see below), whose sum is σ = 57840211364. Its totient is φ = 26695482156.

The previous prime is 40043223239. The next prime is 40043223247. The reversal of 40043223243 is 34232234004.

It is an interprime number because it is at equal distance from previous prime (40043223239) and next prime (40043223247).

It is not a de Polignac number, because 40043223243 - 2² = 40043223239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40043223247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2224623505 + ... + 2224623522.

Almost surely, 2^40043223243 is an apocalyptic number.

40043223243 is a deficient number, since it is larger than the sum of its proper divisors (17796988121).

40043223243 is a wasteful number, since it uses less digits than its factorization.

40043223243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4449247033 (or 4449247030 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 40043223243 its reverse (34232234004), we get a palindrome (74275457247).

The spelling of 40043223243 in words is "forty billion, forty-three million, two hundred twenty-three thousand, two hundred forty-three".